ERDC/CHL CHETN-II-47
March 2004
against the net southeast drift direction in both Anaheim and Alamitos Bays. The local net sand
transport reversals are associated with the long jetties at the harbor entrances as well as the break-
waters of the Los Angeles/Long Beach Harbor.
Mitigation for the hot spots include periodic beach nourishment using a nearshore borrow area for
Surfside (Figure 22). The first fill was placed using an upland source in 1964. The project has been
filled 11 times since then on a roughly 6-year renourishment cycle, with the last one in May 2002.
The dredging of the channel into the Naval Weapons Station was used as a source of fill on two
occasions, but most of the fill has been from nearshore borrow areas. The hot spot at Seal Beach was
nourished with an upland fill source that was moved by rail to the coast and truck hauled onto the
beach by local interests. Local interests filled the Peninsula Beach hot spot with sand back-passed by
truck from the wide beach to the west back to the beach adjacent to the jetty.
Figure 22. Photographs of mitigation for the three hot spots along southern California coast showing
pipeline fill renourishment from offshore borrow area at surfside, upland fill placement at
Seal Beach and truck haul backpassing at Peninsula Beach (courtesy of Chuck Mesa,
Los Angeles District)
ANTICIPATING HOT SPOTS IN PROJECT DESIGN: As illustrated by the preceding case
studies, hot spots tend to be present in many, if not most beach nourishment projects. These hot spots
can, in some cases, introduce unanticipated project costs related to mitigation activities. In other
cases, subdesign conditions exist over much of the renourishment cycle, which may represent
increased vulnerability to damage. As such, prudent beach nourishment project design would include
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